lguest: move changed bitmap to lg_cpu

events represented in the 'changed' bitmap are per-cpu, not per-guest.
move it to the lg_cpu structure

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/lguest/lg.h b/drivers/lguest/lg.h
index f1c4c33..0d6f643 100644
--- a/drivers/lguest/lg.h
+++ b/drivers/lguest/lg.h
@@ -51,6 +51,9 @@
 	u32 esp1;
 	u8 ss1;
 
+	/* Bitmap of what has changed: see CHANGED_* above. */
+	int changed;
+
 	unsigned long pending_notify; /* pfn from LHCALL_NOTIFY */
 
 	/* At end of a page shared mapped over lguest_pages in guest.  */
@@ -92,9 +95,6 @@
 	void __user *mem_base;
 	unsigned long kernel_address;
 
-	/* Bitmap of what has changed: see CHANGED_* above. */
-	int changed;
-
 	struct pgdir pgdirs[4];
 
 	unsigned long noirq_start, noirq_end;